SPIRALPOLE SMALL ANTENNA SYSTEM
A wireless sensor device, system and method includes a handle/antenna component and probe shaft sensor. A spiralpole loop antenna interfaces with a probe shaft comprising electrical connection to a surface acoustic wave (SAW) sensor device for wireless temperature sensing. Applications include monitoring the internal temperature of the contents of ovens.
1 . A probe system for wireless sensing of at least one measurand, said system comprising:
a spiral-dipole (spiralpole) antenna component;
a probe shaft comprising electrical connection;
an acoustic wave device (AWD) sensor in electrical communication with said spiralpole antenna through said probe shaft;
wherein said system is configured to communicate with an excitation signal generator and response signal receiver.
2 . The system of claim 1 , wherein said AWD is a surface acoustic wave (SAW) device.
3 . The system of claim 1 , wherein said AWD is a surface acoustic wave (SAW) resonator device.
4 . The system of claim 1 , wherein said measurand comprises temperature.
5 . The system of claim 4 , further comprising at least one measurand in addition to temperature, to which said acoustic wave device is sensitive.
6 . The system of claim 1 , wherein said at least one measurand is a measurand other than temperature, to which said acoustic wave device is sensitive.
7 . The system of claim 1 , wherein said spiral-dipole antenna component is non-orthogonal to said probe shaft.
8 . The system of claim 1 , wherein multiple said probes operate cooperatively through differential operating frequencies of AWD components in each of said multiple probes.
9 . The system of claim 1 , wherein radiation pattern of said probe is omnidirectional.
10 . The system of claim 1 , wherein performance is direction-independent; whereby movement and orientation of temperature measurement subject does not impact accuracy or resolution of temperature measurement.
11 . The system of claim 1 , wherein said spiral-dipole antenna is mismatched, whereby radiation pattern is broad.
12 . The system of claim 1 , wherein said spiral-dipole antenna component comprises a helical coil.
13 . The system of claim 1 , wherein said spiral-dipole antenna component comprises a helical coil and interfaces with ground arm at a termination of a proximate loop.
14 . The system of claim 1 , wherein said spiral-dipole antenna component comprises a helical coil and interfaces with ground arm at an intermediate location between terminal ends of antenna element of said spiral-dipole antenna component.
15 . A probe device for wireless sensing of at least one measurand, said device comprising:
a spiral-dipole (spiralpole) antenna component;
a probe shaft component in electrical communication with said spiral-dipole (spiralpole) antenna component;
an acoustic wave device (AWD) sensor in electrical communication with said spiralpole antenna through said probe shaft;
wherein said device is configured to communicate with an excitation signal generator and response signal receiver.
16 . A method for wireless sensing comprising:
providing a spiral-dipole (spiralpole) antenna sensor device;
transmitting an excitation signal to antenna of an acoustic wave device (AWD);
receiving said excitation signal at said spiralpole antenna;
reacting, at said AWD, to said excitation signal conveyed from said spiralpole antenna;
transmitting from said spiralpole antenna, a response signal conveyed from said AWD; and
receiving, at a receiver, said response signal.
17 . The method of claim 16 , wherein operating frequency range is about 400 MHz to about 700 MHz.
18 . The method of claim 16 , wherein transmitter antenna of said transmitting step and receiving antenna of said receiving step comprise unitary components.
19 . The method of claim 16 , wherein transmitter antenna of said transmitting step and receiving antenna of said receiving step comprise multiple components
20 . The method of claim 16 , whereby operational field strengths of about 13.5 dB are produced.